The article is an opinion piece, not news. No teens were polled, there's no hard data. Just the author blathering about how much she thinks she knows about what teens want, and a few pundit quotes thrown in for good measure.
This "news" isn't even worth commenting about.
I do agree that Apple must continue to evolve though. But if smartphone market share is really as fad-driven as everyone seems to think, then I would think humungous screens are going to be sooooo last year by the time Apple comes out with something. I'd rather they evolve eslewhere.